US2682316A

US2682316A - Apparatus for purification of dust-laden air

Info

Publication number: US2682316A
Application number: US269205A
Authority: US
Inventors: Kaufmann Hans Jakob
Original assignee: Individual
Current assignee: Individual
Priority date: 1951-02-02
Filing date: 1952-01-31
Publication date: 1954-06-29
Anticipated expiration: 1971-06-29
Also published as: GB692814A

Description

June 29, 1954 H. J. KAUFMANN 2,682,316

APPARATUS FOR PURIFICATION OF DUST-LADEN AIR Filed Jan. 31, 1952 2 Sheets-Sheet l I Inventor HANS JAKOB KAUFMANN M /M Attorneys June 29, 1954 H. J. KAUFMANN 2,682,316

APPARATUS FOR PURIFICATION OF DUST-LADEN AIR Filed Jan. 51, 1952 2 Sheets-Sheet 2 Inventor Hm I1: I05 KAl/F/MA NN 075; z; Ei M A ttorneys Patented June 29, 1954 APPARATUS FOR PURIFICATION OF DUST-LADEN AIR Hans Jakob Kaufmann, Knockholt, England Application January 31, 1952, Serial No. 269,205

Claims priority, application Great Britain February 2, 1951 2 Claims. 1

In the filtration or purification of dust-laden atmospheric airas is necessary, for example, in certain milling operations-it has heretofore been proposed to employ sleeves, usually of textile material, which are suspended in sectional chambers or compartments (wherethrough is induced by means of an exhauster fan the air to be purified) of the air-cleaning apparatus, and are agitated from time to time by mechanical means in order to liberate collected dust, the sleeves of each compartment being carried by a spring-influenced rocker arm: such rocker arms are actuated by cam-operated knocker devices timed to successively engage said arms. A hopper or casing common to all of the sleeve-containing compartments is situated below the unclosed lower portions of same, and includes a worm or valve-controlled dust discharge passage.

The present invention aims toeiiect removal of collected dust from the sleeves of air cleaning apparatus of the typereferred to during its operation, but this without necessity forthe employment of mechanical sleeve agitating means; and my invention broadly resides in the periodic opening of said compartments to admit ambient air, Whilst, preferably, at the same time, maintaining the purified air outlets of the compartments open or partially open, such admitted air being so Whirled in the compartments-due to the vacuous condition existing therein-as to agitate r shake the sleeves, and cause cessation or reversal of the normal a-ir flow through the sleeves, to expel therefrom the collected dust which falls into the hopper to. be spouted-01f, or otherwise removed, as may be desired: on closing the compartments against admittance of ambient air, the sleeves resume their normal air cleaning function. Thus, the dust removal proceeds automatically without necessity for the employment of mechanical means for shaking the sleeves.

I will further describe my invention with the aid of the accompanying sheets of explanatory drawings, which show by way of example only and not of limitation, one mode of embodiment.

In said drawings:

Fig. 1 is a part sectional elevation of air cleaning apparatus adapted to carry my invention into effect.

Fig. 2 is a section drawn to an enlargedscale and taken as on line AA Fig. 1.

Fig. 3 is a fragmentary perspective view of one compartment of the apparatus.

In said drawings there is represented air cleaning apparatus comprising a plurality of compartments a, in each of which are suspended textile sleeves b: the'lower ends of said compartments a are open to a hopper 0 containing discharge means in the form of a worm conveyor d.

The upper part of each compartment a, is connected by a duct e provided with a butterfly valve 6 to a common trunk passage f leading to an exhaust fan (not shown).

Each compartment a has an opening a normally closed by a door or panel a secured to a vertical shaft g'which is revolubly supported by bearings h, and each shaft is provided with an arm 1' adapted to be engaged and actuated periodically by a cam set on awheel Z. Said wheels Z are carried by a horizontal shaft m journalled in bearings m and which shaft is driven, as also the worm conveyor (1, in any convenient manner from a power source.

Said compartment door carrying shafts g are off-set (as shown most clearly in Fig. 3) in relation to the centre lines of their doors (1. so that a door will be normally maintained tightly shut by reason of the vacuous condition prevailing in its compartment. Springs n, n are provided to ensure closing of doors a after disengagement of their actuating cams 7c from the lateral arms 7'.

In use, assuming shaft m. to be rotating at required speed and that the exhaust fan is in operation, thereby causing a vacucus condition to exist in the compartments a, dust laden air is drawn into hopper 0 via intake duct 0 and passes upwardly for cleaning through the compartments a and sleeves Z2, the cleaned air moving from the compartments, via ducts e, into trunk f for expulsion. During the air cleaning process, the doors a of compartments a are periodically opened in turn, or in other desired sequence, by cams It to permit inrush of ambient air whereby sleeves b are violently shaken, and the air flow therethrough ceases or is reversed, to cause the collected dust to be precipitated from the sleeves into hopper c for disposal via worm conveyor cl. In experimental practice I have efiected satisfactory dust-collection by partially opening (note left hand door of Fig. 1 and door of Fig. 3) in turn the doors of each compartment for about three seconds every four or five minutes.

The valves e of ducts e are mounted on shafts g which extend through said ducts and are arranged, in this instance, approximately at right angles to doors a so that, on opening of the latter, ducts e of the respective compartments are partially closed as a precaution against too great a loss of vacuum.

It is, of course, to be understood that I do not desire to confine my invention to the precise means hereinbefore described for effecting control of the sleeve-containing compartments of dust removal apparatus, as any suitable mode of opening automatically the compartments ror the inrush of outside air, and closing same at desired intervals may be adopted. For example, slides or shutters may obviously be substituted for the panels or doors hereinbefore described.

What I claim as my invention and desire to secure by Letters Patent is:

1. Apparatus for effecting removal of collected dust from the sleeves of air cleaning apparatus comprising a plurality of compartments, a hopper connected to said compartments, sleeves of textile material suspended in each of said compartments, means connected to said sleeves for directing the air to be purified of dust therethrough, a pivotally mounted panel closure member associated with each compartment, means for actuating said closure members'whereby said compartments are opened and closed in the desired sequence to permit the inrush of ambient air upon the opening of said closures for agitating said sleeves, a rotatably mounted shaft secured to each of said panel closures, said shaft being oiT-set in relation to the vertical center line of its respective closure, cleaned air outlet ducts connected to the upper parts of said compartments, each of said shafts extending through one of said cleaned air outlet ducts, a plurality of butterfly valves each carried by one of said shafts and positioned in one of said ducts for opening and partially closing the same upon movement of its connected panel, lateral arms mounted on said shafts, a rotatably driven common shaft, and cams mounted on said common shaft and adapted on rotation to engage and release said lateral arms so as to open and permit the closing of said compartments in the desired sequence.

2. Apparatus for effecting removal of collected dust from the sleeves of air cleaning apparatus comprising a plurality of compartments, a hopper connected to said compartments, sleeves oi. textile material suspended in each of said compartments, means connected to said sleeves for directing the air to be purified of dust therethrough, a pivotally mounted panel closure member associated with each compartment, means for actuating said closure members whereby said compartments are opened and closed in the desired sequence to permit inrush of ambient air upon the opening of said closures for agitating said sleeves, a rotatably mounted shaft secured to each of said panel closures, said shaft being off-set in relation to the vertical center line of its respective closure, cleaned air outlet ducts connected to the upper parts of said compartments, each of said shafts extending through one of said cleaned air outlet ducts, a plurality of butterfly valves each carried by one of said shafts and positioned in one of said ducts for opening and partially closing the same upon movement of its connected panel, lateral arms mounted on said shafts, a rotatably driven common shaft, cams mounted on said common shaft and adapted on rotation to engage and release said lateral arms so as to open and permit the closing of said compartments in the desired sequence, and resilient means adapted to close said compartments after actuation and release of said panels.

References Cited in the file of this patent UNITED STATES PATENTS Number Name Date 1,784,339 Clasen et a1. Dec. 9, 1930 1,843,639 Hansen Feb. 2, 1932 FOREIGN PATENTS Number Country Date 21,560 Great Britain Sept. 21, 1909 332,601 Great Britain July 23, 1930 401,186 Germany Aug. 29, 1924 556,619 Germany Aug. 16, 1932 748,144 France 'Apr. 10, 1933